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biology 12th > Srfp > Flashcards

Srfp Flashcards

1
Q

Define flowering plants

A

Flowers are morphological and embryological marvels and site of sexual reproduction

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2
Q

Angiosperm

A

Flowering plants

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3
Q

Sex organ of plant

A

Flower

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4
Q

Formation of gamete known as

A

Gametogenesis

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5
Q

Gamete transfer in plant known as

A

Pollination

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6
Q

Gamete fusion known as

A

Fertilization

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7
Q

Flower arised from which meristem

A

Shoot

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8
Q

How many whorls in flower

A

4

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9
Q

Name them

A

Androecium, gynoecium, corolla, calyx

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10
Q

Basic unit of gynoecium

A

Carpel or pistil

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11
Q

Basuc unit of androecium

A

Stamen

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12
Q

Basic unit of corolla

A

Petal

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13
Q

Basic unit of calyx

A

Sepal

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14
Q

Why calyx and corolla known as non essential whorl

A

They are not directly involved in sexual reproduction

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15
Q

Part of stamen

A

Anther and filament

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16
Q

How many lobes of anther

A

2

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17
Q

Total theca

A

4

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18
Q

Term for 4 microsporangia

A

Tetrasporangiate

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19
Q

Stalk of flower

A

Pedicle

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20
Q

No of anther wall layer

A

4

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21
Q

Name them

A

Epidermis, endothecium, middle layer, tapetum

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22
Q

Who provide nutrition to developing tissue

A

Tapetum

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23
Q

Who helps in dehiscence of anther

A

Endothecium

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24
Q

Ploidy of microspore mother cell

A

2n

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25
Q

Each sporogenous cell is a potential pollen
True or false

A

True

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26
Q

Define microsporogenesis

A

The process of formation of microspres from apollen mother cell through meiosis

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27
Q

Male gametophyte

A

Pollen grain

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28
Q

Outer and inner wall

A

Exine , intine

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29
Q

Exibe is made up of

A

Sporopollenin

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30
Q

Why is exine not continues

A

Due to presence of germ pore

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31
Q

What does germ pore do

A

Lead to development of pollen tube

32
Q

Why is sporopollenin most resistant organic material?

A

It can withstand high temp, strong acid and alkali
Therefore, provide protection to pollen grain and can be preserved in form of fossils (fossilization)

33
Q

Intine is made of

A

Pectin and cellulose

34
Q

Pollen grain divide into 2 cell name them

A

Vegetative and generative

35
Q

Which cell has irregular shaped nucleus

A

Vegetative

36
Q

The centre for pollen storage is

A

Pollen bank

37
Q

example of plant causing allergy

A

parthenium/carrot grass, amaranthus, chenopodium

38
Q

pant having 30 min of pollen viability

A

rice, wheat

39
Q

plant having several months of pollen viability

A

leguminosae, rosacea, solanacea

40
Q

define cryopreservation

A

storage of pollen grains for years in liquid N2 (-196 C) for later use in plant breeding programmes

41
Q

example of apocarpus

A

michelia, lotus, rose

42
Q

example of syncarpus

A

papaver, china rose

43
Q

true or false
can ovules number vary

A

true

44
Q

protective covering of ovule

A

integuments

45
Q

point of junction between ovule and funicle

A

hilum

46
Q

stalk by which ovule is attatched to placenta

A

funicle

47
Q

define megasporogenesis

A

the process of formation of megaspores from megaspore mother cell

48
Q

explain monosporic development

A

when only one megaspore is functional and divides to form female gametophyte (embryo sac)

49
Q

cellular thickenings which help in guiding tube

A

filliform apparatus

50
Q

most common type of ovule is

A

anatropus ovule

51
Q

define pollination

A

transfer of pollen grains from anther to stigma

52
Q

name types of pollination

A

self pollination ( autogamy and geitonogamy) and cross pollination

53
Q

most common biotic agent is

A

pollination by insects (entemophily)

54
Q

what is wind pollination known as

A

anemophily

55
Q

what is water pollination known as

A

hydrophilly

56
Q

example of water pollination

A

limited to 30 genera of monocots

57
Q

which is the most common abiotic agent

A

wind

58
Q

name some floral rewards

A

pollen
nectar
safe place for laying eggs

59
Q

example of epihydrophilly

A

vallisneria

60
Q

pollination below surface of water known as

A

hypohydrophilly

61
Q

example of hypohydrophilly

A

zoostera

62
Q

shape of pollen of zoostera

A

ribbon like

63
Q

example of wind pollinated flower

A

grass family

64
Q

steps of artificial hybridisation

A

emasculation
bagging
debagging
rebagging

65
Q

double fertilisation includes

A

syngamy and triple fusion

66
Q

example of albuminous seed

A

wheat, maize, barley (monocot)

66
Q

ex-albuminous seed example

A

pea, bean, groundnut (dicot)

67
Q

part of seed

A

seed coat, endosperm, embryo

68
Q

which seed has viability only for months

A

oxalis

69
Q

plant whose seed viability is for 10,000 years

A

lupinus arcticus

70
Q

seed viability is 2000 years
excavated from king herods palace near dead sea

A

Phoenix dactylefera (date palm)

71
Q

example of false fruits

A

apple, cashew, strawberry, pear

72
Q

overy without fertilization from fruit

A

parthenocarpic fruits

73
Q

fruit which develops from ovary

A

true fruit

74
Q

parthenocarpic fruit example

A

grapes, banana

75
Q

formation of seed without fertilisation known as

A

apomixis

76
Q

when embryo is formed from unfertilized egg known as

A

parthenogenesis

biology 12th (8 decks)

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